Adsorbents colloidal silicon dioxide

It was already noted that the presence of excessive moisture on the surface of pellets during spheronization could lead to uncontrolled agglomeration. This effect could be minimized by adding adsorbents like colloidal silicon dioxide or talc to the spheronizing pellets, increasing viscosity of binding fluid and complexing soluble materials in the mixture. As in... 

In aerosols, other than those for inhalation, colloidal silicon dioxide is used to promote particulate suspension, eliminate hard settling, and minimize the clogging of spray nozzles. Colloidal silicon dioxide is also used as a tablet disintegrant and as an adsorbent dispersing agent for liquids in powders. Colloidal silicon dioxide is frequently added to suppository formulations containing lipophilic excipients to increase... 

Colloidal silicon dioxide is hygroscopic but adsorbs large quantities of water without liquefying. When used in aqueous systems at a pH 0-7.5, colloidal silicon dioxide is effective in... 

Silicon Dioxide occurs as an amorphous substance that shows a noncrystalline pattern when examined by X-ray diffraction. It is produced synthetically, either by a vapor-phase hydrolysis process, yielding fumed silica, or by a wet process, yielding precipitated silica, silica gel, colloidal silica, or hydrous silica. Fumed silica is produced in an essentially anhydrous state, whereas the wet-process products are obtained as hydrates or contain surface-adsorbed water. 

James, R. 0. and Healy, T. W. Adsorption of hydrolyzable metal ions at the oxide-water interface. I. Cobalt (II) adsorption on silicon dioxide and titanium dioxide as model systems II. Charge reversal of silicon dioxide and titanium dioxide colloids by adsorbed cobalt (II), lanthanum (III) and thorium (IV) as model systems III. 

Gebbert A et al 1992 Direct observation of antibody binding. Comparison of capacitance and refractive index measurement DECHEMA Biotechnol. Conf. 1992 vol 5, part A Microbial Principles in Bioprocesses Cell Culture Technology, Downstream Processing and Recovery pp 459-62 Stenberg M et al 1979 Silicon-silicon dioxide as an electrode for electrical and ellipsometrical measurements of adsorbed organic molecules J. Colloid Interface Sci. 72 255-63... 

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